Java tutorial
/* * Copyright 2000-2018 Vaadin Ltd. * * Licensed under the Apache License, Version 2.0 (the "License"); you may not * use this file except in compliance with the License. You may obtain a copy of * the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations under * the License. */ package com.vaadin.server.communication; import com.vaadin.server.BootstrapHandler; import com.vaadin.server.VaadinServlet; import com.vaadin.server.VaadinServletService; public class ServletBootstrapHandler extends BootstrapHandler { @Override protected String getServiceUrl(BootstrapContext context) { String pathInfo = context.getRequest().getPathInfo(); if (pathInfo == null) { return null; } else { /* * Make a relative URL to the servlet by adding one ../ for each * path segment in pathInfo (i.e. the part of the requested path * that comes after the servlet mapping) */ return VaadinServletService.getCancelingRelativePath(pathInfo); } } @Override public String getThemeName(BootstrapContext context) { String themeName = context.getRequest().getParameter(VaadinServlet.URL_PARAMETER_THEME); if (themeName == null) { themeName = super.getThemeName(context); } return themeName; } @Override protected String getContextRootPath(BootstrapContext context) { return VaadinServletService.getContextRootRelativePath(context.getRequest()) + "/"; } }